Massachusetts Institute of Technology is one of the forerunners in open courseware, making "virtually all MIT course content" available online for public access.
These lectures cover numerous fields including atomic physics and quantum optics; nuclear physics; particle physics; astrophysics and cosmology; condensed matter; quantum information physics and applied physics.
A collection of Physics tutorials that cover basic topics. Newton's laws, vectors, momentum, work and energy, rotational motion, optics, relativity, electricity and magnetism are all represented.